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Senior Mobile Engineer

  • Closed
  • US Company | Medium (51-250 employees)
  • LATAM (100% remote)
  • 5+ years
  • Short-term (40h)
  • Finance
  • Full Remote
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Required skills

  • React Native
  • Node.js
  • JavaScript
  • TypeScript

Requirements

Must-haves

  • 5+ years of mobile development experience
  • Proficiency with React Native
  • Proficiency with Node.js
  • Proficiency with JavaScript and TypeScript
  • Experience with reusable component and library development
  • Experience with version control (e.g., Git, Bitbucket)
  • Knowledge of continuous integration and deployment (CI/CD), including mobile deployment pipelines
  • Deep understanding of asynchronous programming, API consumption, security best practices, and state management
  • Strong problem-solving and analytical skills with a passion for complex engineering challenges
  • Strong communication skills in both spoken and written English

Nice-to-haves

  • Startup experience
  • Experience developing reusable components and libraries
  • Bachelor's Degree in Computer Engineering, Computer Science, or equivalent

What you will work on

  • This is a full-time role (40 hours/week) for a 2-month contract
  • Estimated Hours: 125-176 hours (depending on complexity and existing codebase readiness)
  • 1. Authenticate with SAML 2.0 using your IDP (8-12 hours)
  • - Configure SAML in Auth0 (e.g., set up a new connection, upload IDP metadata)
  • - Update login flow to replace existing authentication methods with SAML
  • - Ensure correct configuration of redirect URIs, assertion consumers, and logout endpoints
  • - Test using a staging IDP setup and debug assertion/audience mismatches
  • - Key Work: Auth0 setup, React Native login updates, testing
  • 2. Specify which web browser to trigger for SSO authentication (6-8 hours)
  • - Implement react-native-inappbrowser-reborn to control browser selection
  • - Add configuration parameter for browser preference (e.g., Chrome, Safari)
  • - Test integration across iOS and Android browsers
  • - Handle cases where the specified browser is unavailable
  • - Key Work: Browser selection settings, invocation handling, testing
  • 3. IP restrict app access (6-10 hours)
  • - Implement middleware to validate user IP against an allowlist/blocklist
  • - Configure IP restrictions in Auth0 or a proxy layer (e.g., AWS API Gateway)
  • - Add UI error handling to display appropriate access restriction messages
  • - Key Work: Middleware setup, Auth0 configuration, UI updates, testing
  • 4. Operate properly in an Android Enterprise Work Profile (8-12 hours)
  • - Use Android Enterprise test environment (e.g., Android Device Policy)
  • - Verify dependencies (storage, notifications, permissions) within the work profile
  • - Address storage isolation and cross-profile restrictions
  • - Key Work: Test environment setup, compatibility fixes, permissions adjustments
  • 5. Push out app config via MDM (12-18 hours)
  • - Define app configuration parameters (e.g., JSON payload) for MDM distribution
  • - Integrate with MDM provider SDKs (e.g., Intune SDK)
  • - Parse and apply MDM configurations on app startup
  • - Key Work: MDM setup, SDK integration, configuration parsing, testing
  • 6. Prevent unrecorded data exfiltration (10-15 hours)
  • - Enforce proxy/VPN whitelist for server communication
  • - Ensure HTTPS and strong TLS encryption for all transmissions
  • - Log outgoing requests for auditing
  • - Implement domain validation and SSL verification
  • - Key Work: Proxy/VPN setup, auditing, security enhancements, testing
  • 7. Prevent copy/paste (6-10 hours)
  • - Block clipboard access using platform APIs
  • - Implement UIPasteboard override (iOS) and ClipboardManager restrictions (Android)
  • - Use secureTextEntry flag for sensitive fields in React Native
  • - Key Work: Clipboard API overrides, secure input handling, testing
  • 8. Prevent screenshots (4-8 hours)
  • - Implement FLAG_SECURE for all Android activities
  • - Use UIScreenCapturedDidChangeNotification to detect iOS screenshots
  • - Display warnings or block actions when a screenshot is detected
  • - Key Work: Platform-specific security measures, UI enhancements, testing
  • 9. Prevent moving data between apps or to storage (8-12 hours)
  • - Use Android Scoped Storage and iOS App Sandbox for file isolation
  • - Disable sharing intents (e.g., Share API)
  • - Block access to external storage paths
  • - Key Work: File system restrictions, API adjustments
  • 10. Limit email/SMS to a specific app (10-15 hours)
  • - Implement deep links or custom schemes for launching designated email/SMS apps
  • - Add configuration options for preferred app selection
  • - Ensure fallback mechanisms for unavailable apps
  • - Key Work: Deep linking, app configuration, testing
  • 11. Prevent email/SMS (4-6 hours)
  • - Remove app features that invoke email/SMS actions
  • - Block programmatic email/SMS sending using platform APIs
  • - Key Work: Code adjustments, feature restrictions
  • 12. Prevent printing (6-10 hours)
  • - Disable export features that generate printable formats (e.g., PDFs)
  • - Block AirPrint using UIPrintInteractionController (iOS)
  • - Override print intents on Android
  • - Key Work: Export feature removal, platform print restrictions
  • 13. Lock/unlock the app with a code or biometric (12-16 hours)
  • - Use react-native-keychain or similar libraries for biometric authentication
  • - Securely store user-defined PIN or passcode
  • - Implement a custom lock screen to verify PIN/biometric authentication
  • - Key Work: Secure storage, lock screen UI, biometric integration
  • 14. Audit data handling in detail (15-20 hours)
  • - Implement detailed logging for data access and transactions
  • - Store logs securely (e.g., server logs, Datadog)
  • - Provide backend tools for reviewing audit trails
  • - Key Work: Data logging, backend integration, documentation
  • 15. Documentation (10-12 hours)
  • - Provide feature overviews and setup instructions (e.g., SAML, MDM)
  • - Document troubleshooting guides for common issues
  • - Ensure clarity and accessibility for client use
  • - Key Work: Clear, detailed, client-focused documentation
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